Saturday, June 30, 2012

Steam To Storms (Again)

Last night's squall line (derecho) did a number on South Jersey -- lots of trees down, power outages, and damage to clean up today.  Since we're dealing with another round of steam and heat today, please take it easy in any clean up efforts.  Drink lots of water, don't overdo it.  For those in areas with power outages, try to get to a place with power (an air conditioning) if possible for at least a time today to help the body cool itself.

Temperatures are starting in the 70's this morning, poised to get into the 90's again this afternoon.  Humidity levels will be similar to yesterday, resulting in heat index values of 100 to 105 across the southern half of the region this afternoon...and in the upper 90's in the Lehigh Valley and Berks. Excessive Heat Warnings are out in the magenta shaded counties around Philly, with Heat Advisories in Delaware and across Central Pennsylvania.  Skies will generally be sunny or sun through filtered high clouds at times through the mornings, with a mostly sunny afternoon ahead of us.

Attention then turns to the potential of another squall line developing this afternoon in Ohio or Western Pennsylvania, possibly feeding off the remnant of a MCS complex that is currently in Ohio.  This system is moving east and will pass through the region this afternoon into the evening hours.  Another round of strong to severe thunderstorms is possible across the Delaware Valley with frequent lightning, hail, and gusty winds...with timing after 4 PM.  More on that later this morning.